By drop boxes I suspect you mean third party storage like Icloud and such, no thanks. USB keys are so useful and can be uplaoded to other computers for whatever so easily.
I guess iCloud was a bad choice but the third party comment still applies. Drop box is an option, but I really don't like others having access to or a copy of my files. I suspect to transfer all this, the main an auxiliary computers and have to be on and web accessed.